wall If mass m is connected with a massless rod to a hinged anchor point, and launched with kinetic energy 2mgR, it will first strike the wall: A] R above the anchor point B] R below the anchor point (launch position) C] somewhere in between A + B If the mass is connected with a massless rope?

C, though B is conceivable.

If spring is compressed by mass m a distance 1m and then released, the friction with the table causes the mass to stop at x=0.

If the spring is compressed to 2m and the mass is released, where will it slide to?

C, 4 times as much travel